1973 Plymouth Scamp accelerating/braking issues, please help

mcnoople said

Have you done anything else to the car? Any car history? What is the state of tune plugs/wires/fuel filter. Does it blow black when you are accelerating? I would start at the carb. I have seen needle valves stick after the car has sat awhile and the fuel evaporated cause similar behavior. Also is the choke staying open? I have had them slap shut going down the road and that is no fun. Most (95%) part store rebuilt carbs have issues of one kind or another.

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I purchased my scamp a few months ago to get in working condition and give to my old man. When I first checked it out, it started fine but I noticed (after checking the oil levels) that the oil smelled like gas, the car need a new battery, new alternator, and fuel pump.

I manage to replace the alternator, the fuel pump, spark plugs, distri cap, battery, and thats about it. I got it running pretty solid but more recently it started acting up. The carb was replaced before I purchased so I crossed that out of the equation, maybe that was a mistake.

After the car starts to idle rough and almost turn off, i press on the gas for a minute, and idle it a little high, after about a minute it feels/sounds like something jams into place and the car runs fine for a brief moment..